Improvement in mowing-machines



M. G. HUBBARD.

Harvester Cutter.

No. 44,629 Patented Oct. 11, 1864.

m n/EN 70/? Q @W N s. Pheln-Lithcgmpfuer. Washington, 0.0.

UNITED STATES PATENT OFFICE.

M. G. HUBBARD, OF SYRACUSE, NEYV YORK.

IMPROVEMENT lN MOWlNG-MACHINES.

Specification forming part of Letters Patent No. 44,629, dated October11, 1864.

To all whom it may concern;

Be it known that I, MOSES G. HUBBARD, of the city of Syracuse-in theState of New York, have invented certain new and useful Improvements inMowing-Machines; and- I do hereby declare the following to be a full andclear description thereof, reference being had to the accompanyingdrawings, in which- Figure 1 is a top View of the inner end and headot'thecutter-bar which forms the subject of my present improvement. Fig.2 is an end view thereof, and Fig. 3 is afront view of the same.

In Fig. 1, A is a malleable iron head, like thosein common use on theKirby and several other mowers, and is riveted on the inner end of thecutter-bar in order to form a jaw for the connection of the pitmanthereto, and in order to give broad surfaces by which to hold the innerend of the cutter-bar in place.

B is the cutter-bar, and, as shown in Fig. 3, U is a piece on the underside to stiffen and strengthen the inner end of the cutter-bar.

D is the point where the bar forming the cutter-bar is bent aroundunder, and the short under piece is thus absolutely connected to thecutter-bar much more securely than could. possibly be done by the rivetsalone, and in such a manner as to efl'ectually resist endwisevibrations,'and thus avoid the crystallization of the parts and theirconsequent breakage, because this connection of the two parts of the baris almost equivalent to a solid bar ofdouble thickness at the inner end,and this increased thickness, having such endwise strength and absoluteendwise connection, gives greater stability to the rivets and theattachment of the cutter-bar head thereby.

The object of my present improvement is to provide a remedy for thegeneral liability of the cutting-bars to break at the inner end while atwork. The liability of these bars to break has come to be one of themost serious obstacles in the way of a general introduction ofmowing-machines, and has no doubt caused farmers more trouble, delay,loss, and expense than all the other sources of trouble togetherexperienced in the use of modern mowing-ma chines.

After an extended series of experi ments I have found that by bendingand doubling under about one foot of the inner end of the steel barforming the cutter'bar, so as to make the inner end double and actuallyconnected at the end, the short under piece is so connected to the upperpiece as absolutely to prevent the possibility of endwise vibration, andin that respect almost equal to a solid bar of double thickness. By thissort of union between the upper bar and the lower piece most of the vstrain which the rivets in holding these two pieces together would getin actual work is sustained by the end connr ction, and this connectionadds greatly to the strength of the combined parts in every respect.Having thus fully described my improvement in mowing-machines, what Iclaim as new therein, and desire to secure by Letters Patent, is

The manner of constructing and strengthening the cutter-bar,substantially as and for the purposes set forth.

M. G. HUBBARD.

Witnesses:

A. A. CARPENTER, 0. J. LYSTER.

